Okay, I'm goin to buy an Aimpoint or an ACOG by Trijicon sometime in the next month and need some questions answered. Assuming money's no object what are the advantages of the CompM4 over the Aimpoint T1 or H1? Which would you buy for your SHTF rifle and why? Or the ACOG? What are the real advantages of each? I don't understand how there could be a difference other than weight with the Aimpoints. Could someone enlighten me please?